Question

The mean weight of 8 numbers is 15 kg. If each number is multiplied by 2, what will be the new.
mean ???​

Answer 1

Mean weight is 8 member is 15

let x/8= 15

x= 120

if each no. multied by 2 then total weight will be 2x = 240

so new mean 2x/8= 2*15 = 30